Tool-holder



' Toon-HOLDER.

- .specification sfrettrs'ratemj Patented Dgemgll.

T all' whom t 'maycofncewt.' Y Y Be it known that l`,-Tiioiwms subject or the King of England, residing at Beading, Berkshire7 England, have inventedy certain new and useful lmprovememtslr` in Tool-Holders, of which the"following is 'a specification.

Y This invention relates generallygtotool holders and particularly to reameriholde'rs.

provide an improved tool-holder of the type i A primary object, oi the invention is to in which movement is lallowedftol the tool,

for example a reamer, so that it vcanfiollow, the axis ofthebore which'is'being ,reamed or otherwise treated, which. tool holderfshall beV of a very simple construction so that it can be made at a low cost.V

` The vinvention consists in thecons'tru'ction, arrangement and combinatic'm-orn Yparts described hereinafter andy pointed voutfinV .the claims. f

One illustrative embodiment of the invention is illustrated bykway Vof" example' the accompanying drawing, wherein Figure 1 is a longitudinal section a learner-holder according to the invention,

Fig. 2 is end elevation thereof as seen from the reamer-receiving end.-

,Like reference letters `designate in both views. 1 Referring to the l 'member A in the form oi a disk has attached like para drawing, the supporting A to it a shank A1 for being secured in the turret of a lathe, and a forward projection A2.

A chuck-member BA also in the Jform of a disk has a forward projection B1 which is hollow to receive the reamer, and is provided with a set-screw B? for securing the same in place. n f

.The disksl A and B are connected 'together by links Cil Each link hasat each end a" hemispherical Venlarged lportion C1.`l- The links lie parallel'to each other and the hem-V BUY ispherical ends engage recesses A3 and B3 in the disks A and B. Owing to this construction, the chuck member and supporting member can 'move rotatably and axially 'relativelyto each other. Preferably, the angle through which theV links can swing out-of their normal position is l'suiliciently vgreat to reduce thedistance between the two disks by at least he part of an inch. :The end por- 1 tions C1 which engage thedisk A`mayl be riveted to the links C, but the end portions through p onto the links and locked bynuts`C2.

' Trroiras HrN'roN, or READING, ENGLAND, assreNon 'ro HnnBnnfri/rnRN-oitor n A Glwhiehengagethe disk B (may HrN'roN, a

*Asprng D' Operates between the dSkSr 'c and B to thrust them apart, one end. of ,the u spring surrounding they orwardly-project;- ing portion of the" n remloe'r A"'and'the" other engaging@` shouldered plate B'which is connectedvto the disk B -by yaiball-bearing LBS 'to receive the thrust transmittelby -th'e "reamen'r i lows z-w Y.

l m .A. eef "'lhe operation ofdeviceisprasfol` Theream'er is mounted in thegchuek-mem; *y

' loer Bandfthe shank vA1V of. thev Supporting# member A ismounted in the turret.; The

reamer 1 fedffup in the Qusualv .mannerj to i enter V'thebore whichV is tov be reamed',andif the fewer -S minuit@ in line Wthgthe afS ,ofthev bore, itwill *adjust itseli'l4 in relation f thereto by ,moving the l' disk bodily, rela tively to the disk A by a'parallellmovement c; i which is controlled byithe links. l.lt will f thus LbeV seenthatzthe reamer is kept .parallel ort." y Immejdi atel a torsion vispuntfon thehlinks, yand Vthe`,ar,igi1.1 which theytake up willy vary according lto the `Size and Vdepth of hole being reamed-. '85 gle will beincreased, 'andthe toolfwill be automatically withdrawn from. the workwhenyjsuch overload occurs. i

Should the reamer bite in this vinitial an# althoughiit is movedr'out of'linewith it'ssup n v 'th @einer C'Qmllelfes fe 50.1155

e It willbe 'appreciated lthatjthe spring D.,

must be strong enough -to keep the disk lBVv at allftimes forwardjso that the hemispheric'al `ends ofthe links arebedded in the receiving recesses of; their respective disks, as other-ly wise tilting of thechuck-member will occur,y

which-will' put the reamer out of parallel "with thel'aXis of the Vbore in the work-piece. f 7

v Obviously other universalconnections,"I could be provided forthe endsv'oflthe'links,

but those vdescribed are inexpensive to man-V. i

ufacture and accurate lin operation.'

referred to *comprising a central driving 100e-lf y Iam aware that it has been proposed here# v 'j 'tofore to provide a tool holder of thetype chuck member. lIn this'kn'own constructionl` therefore, these members were prevented 'l fromturning relatively to one another,fand

such a driving fm'ember and the method adopted of mounting the connecting links,L

i added to the expense of manufacture, and I therefoi'e'make no claim to such a tool holder, but l claim -r l. A tool holder of the characterdescribed Vfor use with a support, comprising in combination a supporting member comprising a disk adapted to be secured to said support, a chuck member comprising a disk normally co-axial with said iirst mentioned disk for receiving a tool, each of Asaid .disks having seats in ,its outer face remote from the other disk, links extending through said disks and having hemispherical portions at each end seated in said seats, said links constituting theKY sole means for connecting and transmitting rotational'movement from the supporting member to thechuck member, and normally extending parallel with the axis common to said members and being free to swing universally each about its point yof connection with said members, whereby the chuck and supporting member may have a ,relative rotary movement andV be caused Y a second disk constituting a chuck member normally co-axial therewith for receiving'a tool, and links connecting said members, said links constituting the sole means for transmitting rotational movement from the supporting member to the chuck member, and

normally extending parallel with the axis common to said members and being free to swing universally each about its points of connection with said members through an `angle out of its normal position suiliciently great to reduce the distance between the two disks by at least one-sixteenth part of an inch, substantially as described.

3.` A tool-holder of the character described for use with a support, comprising a disk constituting a supporting member having a shankadapted to lbe secured to said Support, a second disk constituting a chuck member normally co-axial therewith for receiving Vthetool, a compression spring located between said disks a'ndrtendingv to force the same apart, and links connecting said members, said links constituting the sole means for transmitting rotational movement from f .the support member to the chuck member,

and normally extending parallel Vwith the axis common to said members and being free to swing universally each about its point of n connection with said members whereby vthe chuckr and supporting member may have a relative rotary movement and be caused thereby to move axially relatively to each other, whichv spring is sufliciently strong to counter-balance the end thrust of the tool against the work, substantially as described.

In testimony whereof I have signed my name'to this specification in the presence of two subscribing witnesses.

THoMAs HiNToiv.l

Witnesses:

HARRY L. Linnen, FRANK MOORE. 

